Ward corbett



(No Model.)

- T. LONG & E. CORBETT.

PUNCH BLOCK HOLDER FOR EYELETING MAGHINES.

No. 553,715. Patented Jan. 28, 1896.

ANDREW EGIANAMPHOYO'IJTIIOMWASHINGTDMDI,

NITED STATES PATENT OFFICE.

THOMAS LONG AND EDXVARD CORBETT, OF BOSTON, MASSACHUSETTS; SAID LONG ASSIGNOR TO SAID OORBETT.

PUNCH-BLOCK HOLDER FOREYELETlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 553,715, dated January 28, 1896.

Application filed November 15, 1895. Serial No. 569,015. (No model.)

To aZZ whom it may concern: Be it known that we,THOMAS LON G- and ED- WARD CORBETT, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Punch Block Holders for Eyeleting Machines, which will, in connection with the accompanying drawings, be hereinafter fully described, and specifically defined in the appended claims.

Our invention relates to an improved punchblock holder for eyeleting-machines, in which is employed a tubular sharp edged steel punch which cuts upon a block of softer metal to perforate interposed material by cutting out a portion thereof as is commonly done in eyeleting devices; and the object of our invention is the production of a convenient block-holder which will aid in filing the faces of the block to remove therefrom the indentations of the cutter, as is frequently required in practical use, and which will afford convenient adjustment of the block relatively to the punch, and will permit the use of a more durable block, having two faces which may be alternately presented to the punch, so that two holes of difierent sizes may be cut out on the same block, all as will be hereinafter more fully set forth.

In the accompanying drawings, Figure 1 represents a side elevation of a common footpower punch used in eyeleting, showing the punch and the devices for holding and operating the same, and the softer-metal block seated in the bed of the'machine beneath the punch, all of which are old and well known Fig. 2 is an elevation, full size, of our adj ustable block-holder with its block-adjusting screw and check-nuts. Fig. 3 is a longitudinal section of the same. Fig. 4 is a top end view of Fig. 1. Fig. 5 is a front view of a portion of the machine shown in Fig. 1, with our adjustable block-holder and block in the place of the block shown in said Fig. 1 and as when in practical use.

It is not deemed necessary to particularly describe the construction and'operation of the machine shown in Fig. 1, it being so common and well known, beyond saying that A represents the punch and B the punch-block, The block B presents a level face to the punch and is turned down to a smaller diameter for about half the length of the block, which diminished portion fits a hole in the bed D, as indicated by dotted lines 0 in Fig. 1, while the larger portion bears upon the bed around the hole. The block may be picked out of and replaced in the hole, and has to be filed on its upper face frequently to remove the rough impressions made therein by the punch. It requires some skill on the part of the operator to file the face of the block level, which operation is greatly simplified and facilitated by our improved method of holding and adjusting the block in the machine. Ourholder consists of the hollow post E, the body of which is adapted to take the place of the block B in hole 0 in bed D, as shown in Fig. 5, while the enlarged head E rests down upon the bed the same as the enlarged portion of block B bears thereon.

The long cylindrical block B, Fig. 3, fits the interior hole bored through post E, and is seated upon the upper end of an adj ustingscrew F threaded therein, which is provided with a head F, perforated to receive a wire for turning the same. By turning this screw the upper face of the block may be caused to project above the top of the post, to be level therewith, or to drop below to properly adapt it to the reach or thrust of the punch, as the same may be varied by wear, construction, or adjustment; and when the adjusting-screw I F is in the desired position it may be secured in place by the check-nut G thereon turned against the bottom of the post. The post is also threaded on its exterior, as shown, and

provided with a check-nut H, which serves to hold the post in place by turning the nut H against the under side of bed D, as shown in Fig. 5, this being done to hold the post in place when the screw F is being adjusted and secured. Two opposite fiat surfaces I are formed on the sides of the head E to facilitate holding the post from rotation while it is being secured in place in the bed. A small set-screw J is also employed in the head of the post to hold the block B from rotating therein while being filed on the end face.

A punch-block held in the manner described may be considerably smaller in diameter, thus presenting less surface to be filed and saving thereby both labor and material, and being gaged by the hardened upper face of the surrounding post, which serves as an aid in holding the file level while it cuts the face of the block, much less time and skill are required to properly face the block true and level; and the block, which is of more expensive metal than the other parts, being vertically adjustable as well as reversible, in the manner shown and described, is practically economized by thus diminishing the area of the surface to be filed and by the longitudinal adjustment thereof, whereby the entire body of the block can be practically utilized. This block and holder can be readily applied to the machines already constructed and in common use by separating the several parts and dropping the body of the hollowpost into the hole in the bed I) in place of the old block B and after it is dropped into place, then its check-nut H may be turned onto the post and against the bed. The adj Listing-screw F, carrying its check-nut G, may be turned into the post, and the block B dropped into the post and seated therein on the end of the adjusting-screw F, when the device will be ready for practicaluse and as illustrated in Fig. 5.

lVe claim 1. In a punching-machine employing a punch and block substantially as described, the combination of a hollow post supported by thebed of the machine; an adj Listing-screw threaded into the post; and a punch-block dropped into the hollow of the post and seated upon the end of the adj usting-screw; all substantially as and for the purposes specified.

2. In a punching-machine of the kind described, a detachable post E, adapted to serve as a gage and to aid in filing the face of the block true and level; a reversible block 15, fitted to slide in the post and to have either end thereof presented to the punch; and an adjusting-screw 1* threaded into the post and constructed and arranged to serve as an adjustable seat for the punclrblock, substan tially as and for the purposes specified.

The combination in a punching-machine of a punch A, and means for actuating the same; a bed D arranged to support a punchblpck in the path of the punch; ahollow post E having an enlarged head E, and exterior and interior threads, the head being adapted to rest upon the upper side of the bed while the body projects downward through the same; a nut ll threaded onto the body of the post and arranged to clamp the bed D between the head E and nut II; a screw F threaded into the hollow of the post; a nut G threaded onto the screw and arranged to turn against the end of the post to hold the adjusting-screw F in place; and a punch-block B, seated within the post upon screw F and adapted to slide freely therein; all as and for the purposes specified.

THOMAS LONG. EDlVARI) CORBETT. \Vitnesses:

EUGENE HUMPHREY, JOHN Q. ADAMS. 

